Planetary hours
in Buenos Aires.
The day, from sunrise to sunset, is cut into twelve equal hours; so is the night, from sunset to the next sunrise. Each hour carries a planet, in the Chaldean order. A planetary hour therefore lasts 60 minutes only at the equinoxes: it all depends on the date and the city. Here are the exact hours for your city; what you do with them is up to you.
Planetary day of Tuesday, 4 August 2026: day of Mars
- Sunrise
- 07:44
- Sunset
- 18:15
- Next sunrise
- 07:43
A day hour lasts 53 min; a night hour, 1h 07m. Local time (America/Argentina/Buenos_Aires).
Day
- 1♂︎ Mars07:44 – 08:37
- 2☉︎ Sun08:37 – 09:29
- 3♀︎ Venus09:29 – 10:22
- 4☿︎ Mercury10:22 – 11:14
- 5☽︎ Moon11:14 – 12:07
- 6♄︎ Saturn12:07 – 12:59
- 7♃︎ Jupiter12:59 – 13:52
- 8♂︎ Mars13:52 – 14:44
- 9☉︎ Sun14:44 – 15:37
- 10♀︎ Venus15:37 – 16:29
- 11☿︎ Mercury16:29 – 17:22
- 12☽︎ Moon17:22 – 18:15
Night
- 1♄︎ Saturn18:15 – 19:22
- 2♃︎ Jupiter19:22 – 20:29
- 3♂︎ Mars20:29 – 21:37
- 4☉︎ Sun21:37 – 22:44
- 5♀︎ Venus22:44 – 23:51
- 6☿︎ Mercury23:51 – 00:59
- 7☽︎ Moon00:59 – 02:06
- 8♄︎ Saturn02:06 – 03:14
- 9♃︎ Jupiter03:14 – 04:21
- 10♂︎ Mars04:21 – 05:28
- 11☉︎ Sun05:28 – 06:36
- 12♀︎ Venus06:36 – 07:43
Other cities · Argentina
Questions
How are the planetary hours calculated in Buenos Aires?
On Tuesday, 4 August 2026, the Sun rises at 07:44 and sets at 18:15: the day lasts 10h 31m, that is twelve day hours of 53 min. The night, until the next sunrise at 07:43, lasts 13h 29m: twelve night hours of 1h 07m.
Which planet rules the first hour that day?
Mars, from 07:44 to 08:37: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: the Sun, Venus, Mercury, the Moon, Saturn, Jupiter, then Mars again.
Today’s sky, on YOUR chart
Planetary hours are the same for everyone in a city. Your chart is yours alone: every morning AstroXP crosses the real sky with your birth, to the minute, and tells you what time it plays out for you.
On a computer? Scan this code with your phone.
Calendars
Sunrise and sunset calculated for the city (the Sun’s centre 0°50′ below the horizon: refraction and semi-diameter), local time of the city’s time zone. Checked against astronomy-engine, the app’s engine.